Machine fob



UNITED .c sTA'rEs PATENT OFFICE.

M. T. ROlVLANDS, OF PITTSTON, 'PENNSYLVANIA.

MACHINE FOR DRILLING ROCK.

Specificaton of Letters Patent No. 17,896, dated July 28, 1857.

To all 'whom it may concern:

Be it known that I, Mosns T. RowLANDs, of Pittston, in the county ofLuzerne and State of Pennsylvania, have invented a new and usefulImprovement in Machines for Drilling Rock; and I do hereby declare thatthe same is described and represented in the following specification anddrawings.

To enable others skilled in the art to make and use my invention, I willproceed to describe its construction and operation, referring to thedrawings in which the same letters indicate like parts in each of thefigures.

Figure 1, is an elevation of one side of the machine. Fig. 2, is anelevation of one end. Fig. 3, is a plan or top view.

The nature of my invention consists in certain improvements in rockdrilling machines, which will hereafter be more fully described.

In the accompanying drawings a vibrating centrifugal hammer isrepresented as applied to a drill for boring rocks.

A, A, are standards supporting the bars B, B, which bars are connectedtogether by the cross bar C, as shown in the drawing. The posts D, D,are fastened to the bars B, B, and connected at the top by the bars E,E; the whole forming a strong frame, to support the other parts of themachine; which frame may be braced as shown in the drawing or otherwise.

F, F', are two metal side plates consisting of a bar and arch as shownin Fig. 1, the bar being provided with a flange near each end to fitagainst the insides of the posts D, D. The plates F, F', are connectedto two similar plates G, G', by the screws H, H, by which they are drawntoward one another so as to clamp the posts D, D, and hold the lates atsuch height upon the posts as may be desirable.

` I, is a shaft arranged to turn in the plates F, and Gr, and may beoperated by the crank J, or a pulley or gear may be applied to the shaftto o erate it by such power as may be rovided or that pu ose. The gearK, is astened to the shaft and drives the gear L, and shaft M, whichcarries the wheelN, to operate the hammer P. The shaft M, turns in thelinks Q, Q', one of which con- Vnects it to the shaft I, and the otherto the rod R, in the lates F', and G', opposite to the shaft I. i hehelve S, of the hammer P, is hinged to the periphery of the wheel N, as

shown in the drawing, so as to vibrate in the plane of the wheePsrotation, between the spring T, and stand U, both of which are fastenedto the periphery of the wheel N. When the wheel N, is turned the hammerP, is thrown out by centrifugal force, so that its helve S, is radial tothe shaft M, and as it is carried around it strikes the drill V, a blow;and as the wheel N rotates it draws the hammer from the top of the drilland swings it out so as to strike the drill every time the shaft isturned. If the drill V, is drawn back in turning or recoils from thestone the s ring W, is fastened to the periphery of t e wheel N, andarranged so as to strike the drill and force it against the stone, andleave it in contact with the stone, for the hammer to strike as itfollows the spring.

The frame to hold the drill consists of the two sides a, a, made in theform shown in the drawing and connected together by the bars b, b,through which the drill traverses and by which it is sup orted in theposition desired to drill the ho e in the direction re uired. This frameis arranged to swing on t e end of the shaft I, and rod R, and may beadjusted, so as to hold the drill at such an angle, or in such a ositionas may be required and fastened y the bolts d, d, which pass through thesides a, a, and semicircles e, e, for that pu ose. The semicircles e, e,are fastened to t e plates G and G' so as to be moved up and down withand by the plates. The upper arms a', a', of the sides a, a, areperforated and the shaft M, turns in them so that when the frame ismoved to bring the drill to the angle required, the shaft M is movedalso, to keep it in the same relative position to the drill the links Q,Q', being arranged to turn on the shaft I, and rod R, for that urpose.The drill V, is raised and turned by the clam f, which vibrates aroundthe drill V its ends resting in the spiral slots g, g, in the pieces h,h, fastened to the sides a, a. The rod '11, is fastened to the clamp f,to hold it in a proper position as it is vibrated, the rod i, traversingaround the ares on the bars b, b, shown in Fig. 2. This clamp f, is madein two parts hinged together by the in j; one part 1s connected by thelink k, to t e lever Z, which vibrates on a stud in the side a, and isoperated by the cam m, on the shaft M, connected to the lever by the rodn; the cam Operating the lever so as to close the clamp,

and grip the drill and turn it; the spiral minutely, I do not claim itas such in this slots g, g, inclining upward, so as to raise the clampand draw the drill from the stone as it is turned. After the drill isturned the cam draws the clamp open, so as to release the drill and thenvibrates it back down the spiral slots, ready to grip the drill again,after it has been struck by the hammer. The spring T, eases the helve ofthe hammer when the wheel is turned so slow as to let it fall back andthe stand U, prevents the hammer from falling forward much beyond aradial line under the same circumstances.

Although I have described but one hammer as being applied to theperiphery of the wheel I contemplate that two or a series may be hingedto the wheel in a similar manner so as to strike one after the other inquick succession.

Although I have deseribed the hammer application; but intend to make itthe subject of a separate application, as applied to general purposes.

I believe I have described and represented my invention, so as to enableany person skilled in the art to make and use it. I will now state WhatI desire to secure by Letters Patent, to Wit:

I claim- The combination of the vibrating,` centrifugal hammer, with therotating spring W, and loosely attached drill, V, arranged to operate inrelation to each other, for the urpose of facilitating the drilling ofroc as herein described.

MOSES T. ROWLANDSu Witnesses:

J. DENNIs, Jr., JOHN S. HoLLrNGsHEAD.

